t1/cept/isdn-pri transformers dual surface mount, 1500 vrms, small package rohs peak reflow temperature rating 245c single port t1/e1 solution configurable for tp and coax cable termination transfer-molded, ic-grade packaging ul1950 approved to basic isolation mechanical schematics t10xxnl (date code) (country of origin) .505 max 12,83 .350 8,90 .245 max 6,22 .050 1,27 .375 max 9,58 .280 max 7,11 .004/0,10 16 surfaces 0-8 .050 1,27 .350 8,89 .075 4,45 .328 8,33 suggested pad layout 16x .029 ? .001 0,74 ? 0,03 16x .018 ? .002 0,46 ? 0,05 .010 0,25 www.pulseeng.com 1 t637.c (11/09) bh weight . . . . . . . . . . . . . . . . . 1.0 grams tape & reel . . . . . . . . . . . . . . 600/reel tube . . . . . . . . . . . . . . . . . . . . .40/tube dimensions: inches mm unless otherwise specified, all tolerances are .010 0,25 electrical specifications @ 25c note: optional tape & reel packaging can be ordered by adding a ?t? suffix to the part number (such as t1021nl t ) rohs-6 compliant turns ratio 1 ocl l l c w / w dcr pri dcr sec package/ primary part number (pri:sec 2%) (mh min) (h max) (pf max) (w max) (w max) schematic pins t1021nl 2ct : 1/1.26 & 2ct : 1/1.26 1.5 & 1.5 0.50 & 0.50 40 & 40 0.70 & 0.70 1.00 & 1.00 bh/1 1-3, 11-9 t1075nl 2cs : 1.57/2 & 2cs : 1.57/2 1.5 & 1.5 0.50 & 0.50 40 & 40 0.70 & 0.70 1.00 & 1.00 bh/2 1-2, 5-6 usa 858 674 8100 ? germany 49 7032 7806 0 ? singapore 65 6287 8998 ? shanghai 86 21 32181071 ? china 86 755 33966678 ? taiwan 8 86 3 4643715
50:100 balun 100:50 balun dual xfmr hp-8751a p1 p2 100 100 1. turns ratio ? the turns ratio of these devices have been designed, in conjunction with semiconductor vendor recommendations, to allow connections to various terminations (e.g. 75 or 120 with the same transformer). for example t1075nl can be used with the siemens peb 2235 to achieve connection to the 75 or 120 cable. for 75 termination, the peb 2235 requires the following turns ratio: 1:1.57 (tx) and 1:1.26 (rx) which can be achieved using pins (1-2):(15-16) for tx and (10-11):(5-8) for rx. similarly, for 120 , the following turns ratio are required: 1:2 (tx) and 1:1 (rx), which are pins (1-2):(16-14) for tx and (5-8):(11-9) for rx on the t1075nl. 2. return loss ? itu-t g.703 and european national regulatory docu- ments specify minimum return loss levels. the transformers will allow these limits to be complied within the situations where they are applicable. high frequency common mode chokes for telecom applications (4-lines) hp-8751a p1 p2 50:100 balun 100:50 balun xfmr 3 . frequency 50-100 khz 100 khz-2 mhz 2-3 mhz return loss transmit 9 db 15 db 11 db receive 12 db 18 db 14 db 4. surge voltage capability ? all transformers and chokes meet surge voltage tests according to the most stringent regulatory documents: metallic voltage: 800 v peak, 10/560 sec longitudinal voltage: 2,400 v peak, 10/700 sec 5. flammability ? materials used in the products are recognized as ul94-vo approved. products meet the requirements of iec 695-2-2 (needle flame test). 6. safety agency recognition ? these parts are recognized to meet underwriter laboratories, ul 1950 to basic, per file e133523 (s). 7. common mode re db at 1 mhz. a typical test circuit is shown below. 8. crosstalk attenuation ? in the dual packages, which contain trans- mit and receive transformers side by side, sufficient crosstalk attenu- ation is achieved by the inherent characteristics of the toroid cores as well as by their proper positioning. the crosstalk attenuation is typically 50 db or better from 100 khz to 10 mhz. this result was established with the test circuit shown below. ic mfr. ic part number comments standard temp. tx / rx brooktree uga 510-1 r8069, r8069a, r8069b ? t1021nl vls vp14q575 vp14q575 e1 75 e1 120 t1021nl siemens peb 2235, peb 2235a1, peb 2235b1 peb 2235, peb 2235a1, peb 2235b1 peb 2235, peb 2235a1, peb 2235b1 t1 cept 75 cept 120 t1075nl www.pulseeng.com 2 t637.c (11/09) electrical specifications @ 25c ? operating temperature 0c to 70c note: additional common mode chokes to improve emi performance are available. see data sheet g002 for mechanicals and schematics of common mode chokes. pulse turns ratio ocl c w / w l l dcr isolation package part number (5%) (h min) (pfh max) (h max) ( ? max) (vrms min) pe-65554nl 1 : 1 : 1 : 1 24.0 15 0.20 0.30 500 through hole pe-65555nl 1 : 1 : 1 : 1 8.0 10 0.20 0.25 500 through hole pe-65854nl 1 : 1 : 1 : 1 47.0 16 0.20 0.30 500 surface mount pe-65857nl 1 : 1 : 1 : 1 24.0 15 0.23 0.30 500 surface mount t1/cept/isdn-pri transformers dual surface mount, 1500 vrms, small package for more information: pulse worldwide headquarters 12220 world trade dr. san diego, ca 92128 u.s.a. www.pulseeng.com tel: 858 674 8100 fax: 858 674 8262 pulse europe einsteinstrasse 1 d-71083 herrenberg germany tel: 49 7032 7806 0 fax: 49 7032 7806 135 pulse china headquarters b402, shenzhen academy of aerospace technology bldg. 10th kejinan rd. high-tech zone nanshan district shenzen, pr china 518057 tel: 86 755 33966678 fax: 86 755 33966700 pulse north china room 2704/2705 super ocean finance ctr. 2067 yan an rd. west shanghai 200336 china tel: 86 21 62787060 fax: 86 2162786973 pulse south asia 135 joo seng rd. #03-02 pm industrial bldg. singapore 368363 tel: 65 6287 8998 fax: 65 6287 8998 pulse north asia 3f, no. 198 zhongyuan rd. zhongli city taoyuan county 320 taiwan r. o. c. tel: 886 3 4356768 fax: fre 886 3 43568 20 pulse: 886 3 4356823 performance warranty of products offered on this data sheet is limited to the parameters specified. data is subject to change w ithout notice. other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. ? copyright, 2009. pulse engineering, inc. all rights reserved.
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